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Corrosion inhibition bactericide for oil fields, and preparation method thereof

A bactericide and corrosion-inhibiting technology, applied in the field of oil field corrosion-inhibiting bactericides and their preparation, can solve problems such as poor bactericidal effect, and achieve the effects of slowing down corrosion and inhibiting the growth of bacteria

Inactive Publication Date: 2019-04-30
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a corrosion inhibitor and bactericide for oil field and its preparation method, which is used to solve the problem of poor bactericidal effect of the existing bactericide and corrosion inhibitor for oil field

Method used

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  • Corrosion inhibition bactericide for oil fields, and preparation method thereof
  • Corrosion inhibition bactericide for oil fields, and preparation method thereof
  • Corrosion inhibition bactericide for oil fields, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Embodiment 1 of the present invention provides a corrosion inhibitor and fungicide for oil fields.

[0092] Polymerized organic guanidines are prepared by the following steps:

[0093] In a four-necked flask equipped with a mechanical stirrer, a reflux condenser, a thermometer and an ammonia absorption device, add 11.88 parts by weight of hexamethylenediamine diacetyl, 5.28 parts by weight of guanidine hydrochloride and 10.89 parts by weight of ethylene glycol in proportion , heated to 100°C, reacted for 4 hours, then raised the temperature to 180°C, and continued to react for 2 hours to obtain polymerized organic guanidine.

[0094] The preparation method of anti-corrosion fungicide for oil field:

[0095] First, add 10 parts by weight of oleic acid-based hydroxyethylimidazoline and 20 parts by weight of dodecyldimethylbenzyl ammonium chloride into the reaction kettle, stir and heat to 50°C,

[0096] Then add the 3 parts by weight of hydroxyethylidene diphosphonic ac...

Embodiment 2

[0111] Embodiment 2 of the present invention provides a corrosion inhibitor and fungicide for oil fields.

[0112] Polymerized organic guanidines are prepared by the following steps:

[0113] In the four-necked flask equipped with mechanical stirring, reflux condenser, thermometer and ammonia absorption device, add 12.48 parts by weight of diacetylhexamethylenediamine, guanidine hydrochloride of 9.36 parts by weight and ethylene glycol of 10.58 parts by weight respectively , heated to 100°C, reacted for 4 hours, then raised the temperature to 180°C, and continued to react for 2 hours to obtain polymerized organic guanidine.

[0114] The preparation method of anti-corrosion fungicide for oil field:

[0115] First, add the 8 parts by weight of oleic acid-based hydroxyethylimidazoline and the 17 parts by weight of dodecyldimethylbenzyl ammonium chloride into the reaction kettle, stir and heat to 45°C,

[0116] Then add the 1 weight part of hydroxyethylidene diphosphonic acid and ...

Embodiment 3

[0131] Embodiment 3 of the present invention provides a corrosion inhibitor and fungicide for oil fields.

[0132] Polymerized organic guanidines are prepared by the following steps:

[0133] In a four-necked flask equipped with a mechanical stirrer, a reflux condenser, a thermometer and an ammonia absorbing device, add 9 parts by weight of hexamethylenediamine diacetyl, 5.5 parts by weight of guanidine hydrochloride and 5.25 parts by weight of ethylene glycol in proportion , heated to 100°C, reacted for 4 hours, then raised the temperature to 180°C, and continued to react for 2 hours to obtain polymerized organic guanidine.

[0134] The preparation method of anti-corrosion fungicide for oil field:

[0135] First, add the 13 parts by weight of oleic acid-based hydroxyethylimidazoline and the 22 parts by weight of dodecyldimethylbenzyl ammonium chloride into the reaction kettle, stir and heat to 45°C,

[0136] Then add the 5 parts by weight of hydroxyethylidene diphosphonic a...

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Abstract

The invention discloses a corrosion inhibition bactericide for oil fields, and a preparation method thereof, wherein the corrosion inhibition bactericide comprises: 8-13 parts by weight of oleic acidhydroxyethyl imidazoline, 17-22 parts by weight of dodecyldimethylbenzyl ammonium chloride, 1-5 parts by weight of hydroxyethylidene diphosphonic acid, 1-5 parts by weight of aminotrimethylene phosphonic acid, 1-3 parts by weight of ethylene glycol, 20-31 parts by weight of polymerized organic guanidine, and the balance of water. According to the present invention, the corrosion inhibiting bactericide can retard the corrosion on the collection system and the transportation system of oil fields, and can inhibit the growth of bacteria; and when the amount of the corrosion inhibition bactericideis 50 mg / L, the corrosion inhibition rate is above 75%, the corrosion rate can be controlled at below 0.076 mm / a, and the sterilization rate is above 99%.

Description

technical field [0001] The invention relates to a corrosion inhibitor and bactericide for oil fields and a preparation method thereof. Background technique [0002] During the development and production of crude oil, the collection system and transportation system of the oil field are directly eroded and electrochemically corroded by inorganic acids (such as hydrogen sulfide, carbonic acid, and hydrochloric acid), organic acids, and salts in the oil-water mixture. Moreover, with the exploitation of oilfields, the water content in crude oil continues to rise, and sulfate-reducing bacteria, saprophytic bacteria, and iron bacteria in the oil-water mixture also continue to grow, further aggravating the corrosion of the collection system and transportation system. Corrosion and bacteria in the oilfield collection system and transportation system promote each other, bacteria intensify corrosion, corrosion promotes bacterial growth, and a vicious circle. [0003] The use of corros...

Claims

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Application Information

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IPC IPC(8): C09K8/54A01N57/20A01N43/50A01N33/12A01N47/44A01N31/02A01P1/00
CPCA01N31/02A01N33/12A01N43/50A01N47/44A01N57/20C09K8/54C09K2208/32
Inventor 商芳杜清珍谢刚李梦瑶闫暄崎魏爱军姜伟祺张伟王丹丹刘志刚
Owner PETROCHINA CO LTD
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